Windows hardware-embedded licence - Dell 7470

Hi all you experts - I've just bought a 2017 used Dell laptop, which used to have Linux installed. I want to now replace it with Win10. 
 
But how to select which version of Win10 to install, that matches the original Windows hardware-embedded product key/licence? I understand you can't install any Win10 version, but how do I find out the right version to install?
 
I'd really appreciate your expert advice, thank you & kindest regards,

Many thanks & kindest regards, Niloc1017